{
    "type": "radio",
    "keys": [
        "bridge",
        "tunnel",
        "embankment",
        "cutting"
    ],
    "label": "Structure",
    "placeholder": "Unknown",
    "strings": {
        "options": {
            "bridge": "Bridge",
            "tunnel": "Tunnel",
            "embankment": "Embankment",
            "cutting": "Cutting"
        }
    }
}